Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2012
Revenues:
Company Drive-In sales	$ 405,363	$ 402,296	$ 404,443
Franchise Drive-Ins:
Franchise royalties and fees	138,416	130,737	128,013
Lease revenue	4,291	4,785	6,575
Other	4,279	4,767	4,699
Total revenues	552,349	542,585	543,730
Costs and expenses:
Food and packaging	116,325	114,545	113,775
Payroll and other employee benefits	139,939	142,511	144,531
Other operating expenses, exclusive of depreciation and amortization included below	85,845	86,153	89,164
Total cost of Company Drive-In sales	342,109	343,209	347,470
Selling, general and administrative	69,415	66,022	65,173
Depreciation and amortization	42,210	40,387	41,914
Provision for impairment of long-lived assets	114	1,776	764
Other operating (income) expense, net	(176)	1,943	(531)
Total costs and expenses	453,672	453,337	454,790
Income from operations	98,677	89,248	88,940
Interest expense	25,382	29,098	31,608
Interest income	(469)	(592)	(630)
Net loss from early extinguishment of debt		4,443
Net interest expense	24,913	32,949	30,978
Income before income taxes	73,764	56,299	57,962
Provision for income taxes	25,848	19,598	21,877
Net income	$ 47,916	$ 36,701	$ 36,085
Basic income per share	$ 0.87	$ 0.65	$ 0.60
Diluted income per share	$ 0.85	$ 0.64	$ 0.60
Cash dividends declared per common share	$ 0.09